1 files changed, 187 insertions, 0 deletions
diff --git a/unix/tclUnixSock.c b/unix/tclUnixSock.c
new file mode 100644
index 0000000..a2b4015
--- /dev/null
+++ b/unix/tclUnixSock.c
@@ -0,0 +1,187 @@
+/*
+ * tclUnixSock.c --
+ *
+ *	This file contains Unix-specific socket related code.
+ *
+ * Copyright (c) 1995 Sun Microsystems, Inc.
+ *
+ * See the file "license.terms" for information on usage and redistribution of
+ * this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ */
+
+#include "tclInt.h"
+
+/*
+ * The following variable holds the network name of this host.
+ */
+
+static TclInitProcessGlobalValueProc InitializeHostName;
+static ProcessGlobalValue hostName =
+	{0, 0, NULL, NULL, InitializeHostName, NULL, NULL};
+
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * InitializeHostName --
+ *
+ * 	This routine sets the process global value of the name of the local
+ * 	host on which the process is running.
+ *
+ * Results:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static void
+InitializeHostName(
+    char **valuePtr,
+    int *lengthPtr,
+    Tcl_Encoding *encodingPtr)
+{
+    CONST char *native = NULL;
+
+#ifndef NO_UNAME
+    struct utsname u;
+    struct hostent *hp;
+
+    memset(&u, (int) 0, sizeof(struct utsname));
+    if (uname(&u) > -1) {				/* INTL: Native. */
+        hp = TclpGetHostByName(u.nodename);		/* INTL: Native. */
+	if (hp == NULL) {
+	    /*
+	     * Sometimes the nodename is fully qualified, but gets truncated
+	     * as it exceeds SYS_NMLN. See if we can just get the immediate
+	     * nodename and get a proper answer that way.
+	     */
+
+	    char *dot = strchr(u.nodename, '.');
+
+	    if (dot != NULL) {
+		char *node = ckalloc((unsigned) (dot - u.nodename + 1));
+
+		memcpy(node, u.nodename, (size_t) (dot - u.nodename));
+		node[dot - u.nodename] = '\0';
+		hp = TclpGetHostByName(node);
+		ckfree(node);
+	    }
+	}
+        if (hp != NULL) {
+	    native = hp->h_name;
+        } else {
+	    native = u.nodename;
+        }
+    }
+    if (native == NULL) {
+	native = tclEmptyStringRep;
+    }
+#else
+    /*
+     * Uname doesn't exist; try gethostname instead.
+     *
+     * There is no portable macro for the maximum length of host names
+     * returned by gethostbyname(). We should only trust SYS_NMLN if it is at
+     * least 255 + 1 bytes to comply with DNS host name limits.
+     *
+     * Note: SYS_NMLN is a restriction on "uname" not on gethostbyname!
+     *
+     * For example HP-UX 10.20 has SYS_NMLN == 9, while gethostbyname() can
+     * return a fully qualified name from DNS of up to 255 bytes.
+     *
+     * Fix suggested by Viktor Dukhovni (viktor@esm.com)
+     */
+
+#    if defined(SYS_NMLN) && SYS_NMLEN >= 256
+    char buffer[SYS_NMLEN];
+#    else
+    char buffer[256];
+#    endif
+
+    if (gethostname(buffer, sizeof(buffer)) > -1) {	/* INTL: Native. */
+	native = buffer;
+    }
+#endif
+
+    *encodingPtr = Tcl_GetEncoding(NULL, NULL);
+    *lengthPtr = strlen(native);
+    *valuePtr = ckalloc((unsigned int) (*lengthPtr)+1);
+    memcpy(*valuePtr, (void *) native, (size_t)(*lengthPtr)+1);
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * Tcl_GetHostName --
+ *
+ *	Returns the name of the local host.
+ *
+ * Results:
+ *	A string containing the network name for this machine, or an empty
+ *	string if we can't figure out the name. The caller must not modify or
+ *	free this string.
+ *
+ * Side effects:
+ *	Caches the name to return for future calls.
+ *
+ *----------------------------------------------------------------------
+ */
+
+CONST char *
+Tcl_GetHostName(void)
+{
+    return Tcl_GetString(TclGetProcessGlobalValue(&hostName));
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TclpHasSockets --
+ *
+ *	Detect if sockets are available on this platform.
+ *
+ * Results:
+ *	Returns TCL_OK.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+TclpHasSockets(
+    Tcl_Interp *interp)		/* Not used. */
+{
+    return TCL_OK;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TclpFinalizeSockets --
+ *
+ *	Performs per-thread socket subsystem finalization.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void
+TclpFinalizeSockets(void)
+{
+    return;
+}
+
+/*
+ * Local Variables:
+ * mode: c
+ * c-basic-offset: 4
+ * fill-column: 78
+ * End:
+ */